letters (to sort) into the different towns usually.
The postbox (to empty) tomor­row
My question (to answer) yesterday.
Many houses (to build) in our town every year.
The mail (to load) into the train. 
His new book (to finish) next year.
Раскройте скобки, употребляя глагол в Passive Voice.  
пожалуйста с предложением напишите, у нас училка туповатая, тему нормально не     учит((
оооочень надо или на четверть 2 поставит 

letters are usually sorted into the different towns.the postbox will be empty tomorrow.my question was answered yesterday.many houses are built in our town every year.the mail is loaded into the train. his new book will be finished.